Cyber Security Specialist

Are you a cybersecurity expert who thinks like an attacker? At Randstad Digital, we are looking for a Senior Detection Engineer & Threat Hunting Lead to drive our threat detection and hunting programmes. This is a high-ownership, hands-on role where you will design elite detections, lead incident responses, and eventually build a team around you to secure leading organizations.

your responsibilities

• Detection Engineering: Design and maintain SIEM/XDR detection rules with full lifecycle ownership.
• Gap Analysis: Map coverage blind spots against threat actor TTPs (MITRE ATT&CK).
• Incident Response: Lead L2/L3 incident response, containment, and remediation efforts.
• Purple Teaming: Run breach & attack simulations to validate detection coverage.
• Detection-as-Code: Build and manage frameworks using CI/CD pipelines and version control.
• Threat Hunting & Intel: Execute hunting hypotheses and translate threat feeds into actionable alerts.
• Testing & Compliance: Act as the blue team counterpart for red team, TIBER, and DORA testing.
• Community: Represent the company in industry groups (ISACs, CSIRTs).

your profile

• Experience: Several years of hands-on experience in Detection Engineering, SOC, or CSIRT roles.
• Tech Stack: Deep knowledge of SIEMs (Sentinel, Splunk, QRadar) and SOAR automation.
• Skills: Expert in attacker TTPs, digital forensics, and incident handling.
• Languages: Trilingual in English, Dutch, and French.
• Leadership: Ready to lead a functional working group or mentor a growing team.

nice to have

• Background in Government, Defense, Banking, or Critical Infrastructure (OT/ICS).
• Python scripting for security automation.
• Certifications: CISSP, CISM, or specialized Threat Hunting/Intel tracks.

our offer for employees

• A personalized salary package: we know that everyone has different needs, so you have the chance to supplement your salary with benefits that you need most today. A car, mobility budget, additional insurance, a leased bike,... the choice is yours thanks to our Flex Income Plan!
• Personal guidance: we believe in the power of human connections, so we'll assign you a dedicated talent manager who will always have your back. Whether you need support during challenging projects or just a friendly ear to listen, your talent manager is here for you.
• Career planning and professional development: our learning and development team is here to help you create your dream career. Think of them as your fairy godparents - but with less bibbidi-bobbidi-boo.
• Team events: a team that plays together, stays together. From an after work drink to a quiz night, we'll make sure you feel like part of the family.
• We care, we grow, we recognize: we invest in these 3 pillars in order to build a sustainable career for you. We have lots of initiatives in place to help you stay healthy and happy so that you can take on every challenge that comes your way and feel appreciated.
• Challenging projects and an entrepreneurial culture: get ready to flex your muscles on some seriously impressive projects. It's like the Olympics, but without the lycra.
• Learning from peers: as a technical expert, you will be part of our chapters: vibrant communities filled with colleagues who are passionate about a particular area of expertise. Our chapters are all about promoting learning within your area of expertise - in a fun and informal way!

our offer for freelancers

• Are you a freelancer? We've thought of you too!
• We offer a self-billing tool and pay your invoices accurately and on time (30 days).
• The team of recruiters, account managers, and talent managers is involved in and closely monitors your career.
• Towards the end of your project, we proactively search for your next challenge and provide the necessary guidance.